Fixes issue where MessageSent_EventIsRaised test passes in isolation but often failes when run with all tests in project.
Fixes issue where MessageSent_EventIsRaised test passes in isolation but often failes when run with all tests in project.

hibernating-rhinos/rhino-queues,LightningQueues/LightningQueues,hibernating-rhinos/rhino-queues,LightningQueues/LightningQueues